A burning smell from a powerpoint, light switch or nearby wall can indicate overheating or damaged components. Stop using the affected outlet and arrange an emergency electrical assessment. Do not investigate behind the fitting yourself.
Report an electric shock or tingle to the electricity distributor immediately; for Ausgrid, call 13 13 88. See Ausgrid's emergency guidance (opens in new tab).
What a burning smell usually means
A burning smell from a powerpoint can be caused by:
- A loose connection behind the outlet. A loose terminal can cause arcing and heat; testing is needed to establish the cause.
- A worn or overloaded powerpoint. Outlets that regularly handle high-draw appliances like heaters, irons, or air conditioners can degrade faster.
- A damaged appliance plug or lead. Sometimes the problem is the device, not the outlet. A melted or discoloured plug is a sign.
- A circuit carrying more load than it should. If multiple high-draw devices share one circuit, the wiring and outlet can overheat.
- Hidden wiring damage. Rodent damage, nail strikes during renovations, or aged insulation can cause faults that are not visible from the front of the outlet.
That is why powerpoint replacement is often part of the repair, but not always the whole story. The electrician may need to trace the fault deeper into the wiring or check the switchboard.
Signs the situation is urgent
Treat the issue as urgent if you notice any of the following:
- Heat at the outlet or the surrounding wall surface.
- Popping, crackling, or buzzing sounds from behind the wall plate.
- Repeated tripping of the circuit breaker or safety switch.
- Visible scorch marks, melting, or discolouration on the outlet face.
- A smell that gets stronger when something is plugged in or when the circuit is under load.
- Sparks when plugging in or unplugging a device.
Any of these symptoms can indicate an active electrical fault that could lead to a fire if left unaddressed.
What not to do
Do not keep resetting the circuit to test whether the smell comes back. Each reset re-energises the fault.
Do not keep plugging devices back in to isolate the problem. Let an electrician do that with proper testing equipment.
Do not assume a single outlet issue is isolated. A faulty powerpoint can be a symptom of broader wiring or switchboard problems, especially in older properties.
Do not use tape, glue, or other temporary fixes on a damaged outlet. The fitting needs to be replaced properly.
What an electrician will check
A licensed electrician will normally inspect:
- The outlet itself for signs of arcing, heat damage, or loose terminals.
- The wiring behind the wall plate for damage, discolouration, or incorrect connections.
- The circuit load to determine whether the outlet has been overloaded.
- The switchboard to check whether the circuit is properly protected by a safety switch and appropriately rated breaker.
- Surrounding outlets on the same circuit, since the fault may extend beyond the single fitting.
Depending on what is found, the repair may be as simple as replacing the outlet and tightening connections, or it may involve rewiring part of the circuit or upgrading the switchboard protection.
How to prevent powerpoint problems
While not all faults are preventable, a few habits reduce the risk:
- Avoid daisy-chaining power boards or overloading outlets with multiple high-draw appliances.
- Have an electrician replace cracked, damaged or discoloured outlets.
- Arrange an assessment when faults or signs of damage appear, or when planning changes to the electrical installation.
- Use appliances that are in good condition with undamaged plugs and leads.
- If you notice unusual warmth, discolouration or a burning smell, stop using the outlet and arrange an inspection. Do not touch it to test its temperature.
What to note before you call
From a safe distance, note which outlet or switch is affected, what was plugged into it, how long the smell has been present and whether it is stronger when something is running. Say whether the plate or the surrounding wall looks discoloured, whether anything has tripped and whether other outlets in the room are affected. Mention the room and the suburb.
Do not unplug the appliance if the plug or outlet is hot, discoloured or damaged; leave it and keep clear. Do not remove the wall plate, run a hand over the wall or plug something else in to check. If the smell is fading, mention that too; it does not mean the fault has gone.
Common misunderstandings
The smell has stopped, so the problem is over. A loose or arcing connection can heat up under load and cool when the load is removed. The damage remains, and the next time the outlet is used the heating resumes.
It is only one powerpoint, so it is minor. An outlet can be the point where a circuit fault becomes noticeable, not the fault itself. Other outlets on the same circuit and the switchboard may need checking.
Replacing the outlet is a DIY job. In NSW, fixed wiring work, including replacing a powerpoint, must be carried out by a licensed electrician. The replacement also needs to follow a check of the wiring behind it.
A power board is the same as a new circuit. A power board adds outlets on the same circuit and the same wiring. It adds convenience, not capacity, and a burning smell at an outlet feeding a loaded power board is a sign that the circuit is being asked to do too much.
What to do next
If you notice an electrical burning smell, stop using the outlet, keep away and call AB Electrical on 0405 343 343. Do not wait for a form response. Call 000 first for smoke, fire or immediate danger.
